You must bring questions with you to every job interview. Here are three good questions to ask your interviewer:

1. How does this position contribute to the department’s — and the company’s — success?

2. What will a successful first year in this job look like? What will your new hire accomplish in their first year that will make you overjoyed you hired him or her?

3. Who are the internal and external customers of the person in this job, and what do those customers want?

You will come up with more questions to ask as you research the company you’re going to be interviewing with.

You’ll develop questions about the position, the company’s goals, the manager’s communications style and much more.

New questions will pop into your mind during the interview. Don’t be afraid to ask questions — it’s the best thing a candidate can do!

At the same time, there are certain questions never, ever to ask at a job interview. Ten of them are listed below.

Ten Questions Never, Ever To Ask At A Job Interview

1. What does your company do?

You can say, “I know Acme Explosives manufactures stick dynamite for the coyote market — but I’d love to hear your perspective on the organization and its mission.”

You can’t show up at a job interview not knowing what the company does. That’s what the internet is for!

2. Do you have any other positions available, apart from this one?

Right now, you’re sitting in an interview talking about a specific job. Don’t ask about other positions unless the interviewer says, “I don’t think you’re a good fit for this job.”

If you feel that the job you’re discussing is not a good fit for you, you can say so — but until you’ve reached that point, keep the conversation on topic and remember that no one can force you to take a job if you don’t want to.

If they make you an offer and it doesn’t excite you, you can inquire about other available positions then. Cross that bridge later!

3. Does it matter if I have a vacation coming up in two months?

Don’t bring up “housekeeping” issues like a planned vacation (or surgery, or any other fixed-date event) until you are close to the offer stage.

If they want to hire you, they’ll work around your vacation, surgery or other previously-scheduled event.

3. Which bus comes to your building from the east side of the city?

It’s up to you to figure out public transportation. Every public transit authority has online maps and schedules. It’s not the interviewer’s job to know every bus and train route, and this type of low-altitude question doesn’t brand you as a professional.

4. Do you use ABC Software here?

If they care about your proficiency with a particular software program, they will ask you. If you ask whether they use ABC Software and they don’t, you’ll be hanging in the breeze. The interviewer will say, “No, we use XYZ Software — are you proficient in that?” and you’ll have to say, “Nope.”

There’s no advantage to asking, “What kind of software do you use here?” in the early stages of your interview process.

5. Do you drug test applicants?

This is the biggest red-flag question you can ask. Even if you’re just asking out of curiosity or because you eat a poppy-seed bagel every day and you’re worried about the poppy seeds messing up your drug test results, don’t ask the question!

If they drug-test applicants, they will tell you that when it’s time for you to take the drug test.

Cut back on the poppy seed bagels, just in case.

6. Are you interviewing other people for the job?

You can safely assume they’re interviewing other people. Also, what difference does it make? If it’s the right job for you at this moment in time, they’ll make you an offer, and you’ll accept.

Don’t worry about other candidates they may be considering. Focus on yourself!

7. If I don’t get the offer this time, how long do I have to wait to re-apply?

I include this question on our list of “Don’t Ask” interview questions because I have heard it from applicants’ lips so many times.

Everyone can understand how nerve-wracking the job search process can be. Don’t make it worse by asking your interviewer what to do if you don’t get the job!

8. Are you going to talk to my former employer?

Any employer who’s considering hiring you is going to conduct some type of employment verification process. That process works through your former employer’s HR department.

Unless you listed your former manager as one of your references, prospective employers are very unlikely to talk to your old boss (or even to learn your former boss’s name).

Don’t put questions about your relationship with your ex-boss in their minds by asking, “Are you going to talk to my former employer?”

9. Does your company offer tuition reimbursement? How much is the deductible on your dental plan? How many vacation days will I accrue in the first three months? Does your health plan cover contact lenses?

It is a bad use of your precious face-to-face interview time to ask questions about the specifics of the company’s benefit plans. Ask for a copy of the health care program documents and read them when you get home.

You have a real person who works for the company in front of you — pick their brain about the work, the mission, the challenges, the opportunity and the culture.

This is another unnecessary and potentially alarming question for a job applicant to ask at an interview.

You can ask, “What is the waiting period for health benefits?” or, “What is your 401(k) eligibility schedule?” but don’t ask about the probationary period specifically.

If you do, it sounds like you’re anxious about making it through your probationary period. In reality, the probationary period for newcomers isn’t all that significant unless you work in a unionized environment that gives workers more protection after they’ve finished probation.

For everybody else, a major slip-up on Day 100 of your employment will outweigh the fact that you’ve completed your 90-day probation. Don’t give your possible next boss reason to wonder,”Why does this person care so much about the probationary period?”

Ask for a copy of the company’s handbook instead of asking this question —and read it cover to cover!

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